Debt instrument principal and accrued interest outstanding repayment.

No definition available.

Name:	aspn_DebtInstrumentPrincipalAndAccruedInterestRepayment
Namespace Prefix:	aspn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fair Value Assumptions Change In Weighted Average Rate

+ References

No definition available.

+ Details

Name:	aspn_FairValueAssumptionsChangeInWeightedAverageRate
Namespace Prefix:	aspn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighting to arrive at discount rate.

+ References

No definition available.

+ Details

Name:	aspn_WeighingToArriveAtDiscountRate
Namespace Prefix:	aspn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_SubordinatedBorrowingLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The portion of the carrying value of subordinated debt as of the balance sheet date that is scheduled to be repaid within one year or in the normal operating cycle, if longer. Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20

-Article 5

+ Details

Name:	us-gaap_SubordinatedDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Subordinated Notes - Additional Information (Detail) (USD $)				1 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Jun. 20, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2014 Subordinated Notes [Member]	Sep. 30, 2013 Subordinated Notes [Member]	Dec. 31, 2013 Subordinated Notes [Member]	Sep. 30, 2013 Subordinated Notes [Member] Repayment Prior to Maturity on June 30, 2014 [Member]	Dec. 31, 2013 Subordinated Notes [Member] Repayment Prior to Maturity on June 30, 2014 [Member]	Sep. 30, 2013 Subordinated Notes [Member] Repayment at Maturity on September 30, 2014 [Member]	Dec. 31, 2013 Subordinated Notes [Member] Repayment at Maturity on September 30, 2014 [Member]
Subordinated Borrowing [Line Items]
Repayment of principal balance and accrued interest				$ 18,800,000
Subordinated notes		17,306,000
Subordinated Notes, discount rate					20.00%	20.00%
Weighing to arrive at discount rate							20.00%	20.00%	80.00%	80.00%
No material difference if weightings were increased or decreased, percentage					10.00%	10.00%
Fair value of Subordinated Notes	18,800,000	17,300,000	16,500,000
Subordinated Notes, unpaid principal balance					$ 14,400,000	$ 15,900,000